document.write( "Question 314463: the sum of the first n terms,Sn of a series is given by Sn=2n*2/(n*n)+1,then
\n" ); document.write( "is the third term is 9/5? \n" ); document.write( "

Algebra.Com's Answer #224929 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"Sn=%282n%2A2%29%2F%28%28n%2An%29%2B1%29\"$
\n" ); document.write( " $\"S1=%282%2A1%2A2%29%2F%281%2B1%29=4%2F2=2\"$
\n" ); document.write( " $\"S2=%282%2A2%2A2%29%2F%284%2B1%29=8%2F5\"$
\n" ); document.write( " $\"S3=%282%2A3%2A2%29%2F%289%2B1%29=12%2F10=6%2F5\"$
\n" ); document.write( "Those are the sums of terms.
\n" ); document.write( "The first term is equal to the first sum.
\n" ); document.write( " $\"a1=2\"$
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\n" ); document.write( " $\"S2=a1%2Ba2=8%2F5\"$
\n" ); document.write( " $\"2%2Ba2=8%2F5\"$
\n" ); document.write( " $\"a2=8%2F5-10%2F5\"$
\n" ); document.write( " $\"a2=-2%2F5\"$
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\n" ); document.write( " $\"S3=a1%2Ba2%2Ba3=8%2F5%2Ba3\"$
\n" ); document.write( " $\"8%2F5%2Ba3=6%2F5\"$
\n" ); document.write( " $\"highlight%28a3=-2%2F5%29\"$ \n" ); document.write( "

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